123604045381 has 4 divisors (see below), whose sum is σ = 123604820064. Its totient is φ = 123603270700.

The previous prime is 123604045319. The next prime is 123604045399. The reversal of 123604045381 is 183540406321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 123604045381 - 2⁹ = 123604044869 is a prime.

It is a super-2 number, since 2×123604045381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123604045381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123604025381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50185 + ... + 499726.

It is an arithmetic number, because the mean of its divisors is an integer number (30901205016).

Almost surely, 2^123604045381 is an apocalyptic number.

It is an amenable number.

123604045381 is a deficient number, since it is larger than the sum of its proper divisors (774683).

123604045381 is an equidigital number, since it uses as much as digits as its factorization.

123604045381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774682.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 123604045381 in words is "one hundred twenty-three billion, six hundred four million, forty-five thousand, three hundred eighty-one".